I don't know... Maybe a focus group request? It helps composing with long and macro lenses apparently.

Still strange. I recall reading reports about the IBIS can be set to start working with a half press of the shutter button thus enabling a steady view in the EVF (or LCD). Having two IBIS mechanisms in the camera seems just unlikely, especially if one of them make a humming sound while not being needed.

My guess still is this is the IBIS holding the sensor at place.

EDIT: I'm sorry for being so slow... Re-reading your post I now understand you aren't thinking of a separate IBIS for the EVF. Well, the stabilization of the EVF should be an option, having the sensor at place with the camera turned on is just necessary. A noise is not a good thing, at any dB rate.

I still don't understand what they mean. I agree with your original point - the sound is probably the sound of the IBIS actively doing nothing.

Or are you two saying that when it is switched off it is
on
but switches off for the shot? Seems unlikely too....

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